Complete Battery Tool Suite
Professional-grade calculators and conversion tools for all your battery and power needs. From basic capacity conversions to complex energy cost analysis.
Power Calculator
Calculate charging time, runtime, and power consumption for any device or battery system.
Capacity Converter
Convert between mAh, Ah, and Wh. Essential for comparing batteries across different devices.
Battery Life Estimator
Estimate how long your battery will last based on usage patterns and degradation factors.
Solar Battery Juice
Size your solar battery bank for off-grid systems and backup power applications.
UPS Runtime Calculator
Calculate backup time for Uninterruptible Power Supply systems and estimate requirements.
Energy Cost Calculator
Calculate electricity costs for charging batteries and running devices over time.
Specialized Calculators
Wire Gauge Calculator
Calculate proper wire gauge for DC systems based on current, distance, and voltage drop requirements.
Parallel Battery Juice
Calculate total capacity and current distribution when connecting batteries in parallel.
Quick Reference
Common Battery Voltages
| AA/AAA Alkaline | 1.5V |
| AA/AAA NiMH | 1.2V |
| Li-ion Cell | 3.7V |
| Car Battery | 12V |
| Laptop Battery | 10.8-14.8V |
| Electric Vehicle | 400-800V |
Typical Power Consumption
| LED Light (9W) | 9W |
| Smartphone | 2-8W |
| Laptop | 45-100W |
| Desktop PC | 200-500W |
| Refrigerator | 100-200W |
| Electric Car | 15-20 kW |